c/1575: 12-line C program coredumps gcc version 2.96

[esr at thyrsus dot com]

>Number:         1575
>Category:       c
>Synopsis:       12-line C program coredumps gcc version 2.96
>Confidential:   no
>Severity:       serious
>Priority:       medium
>Responsible:    unassigned
>State:          open
>Class:          sw-bug
>Submitter-Id:   net
>Arrival-Date:   Sat Jan 06 15:16:01 PST 2001
>Closed-Date:
>Last-Modified:
>Originator:     Eric S. Raymond
>Release:        gcc 2.96
>Organization:
>Environment:
Red Hat 7.0
>Description:
/*
 * Compile this under 
 *	gcc version 2.96 20000731 (Red Hat Linux 7.0)
 * to core-dump the compiler.
 *
 * This is a minimal example; I couldn't delete any more statements 
 * and still produce the segfault.
 *
 * Bug submitted by Eric S. Raymond, 6 Jan 2001.
 */
void croak(void)
{
    int			swap, swapval, i, *scramble;

    if ((scramble = (foo *) malloc(bar, sizeof(int)) == NULL)
    {
	fprintf(stderr, "this would never compile anyway\n");
    }
    
    swapval = scramble[swap];
    scramble[swap] = scramble[i];
}
>How-To-Repeat:
/*
 * Compile this under 
 *	gcc version 2.96 20000731 (Red Hat Linux 7.0)
 * to core-dump the compiler.
 *
 * This is a minimal example; I couldn't delete any more statements 
 * and still produce the segfault.
 *
 * Bug submitted by Eric S. Raymond, 6 Jan 2001.
 */
void croak(void)
{
    int			swap, swapval, i, *scramble;

    if ((scramble = (foo *) malloc(bar, sizeof(int)) == NULL)
    {
	fprintf(stderr, "this would never compile anyway\n");
    }
    
    swapval = scramble[swap];
    scramble[swap] = scramble[i];
}
>Fix:
No fix.
>Release-Note:
>Audit-Trail:
>Unformatted: